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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / drivers / video / da8xx-fb.c
blobd065894ce38fbf952a46d2da87da67b34374289a
1 /*
2 * Copyright (C) 2008-2009 MontaVista Software Inc.
3 * Copyright (C) 2008-2009 Texas Instruments Inc
4 *
5 * Based on the LCD driver for TI Avalanche processors written by
6 * Ajay Singh and Shalom Hai.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option)any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/fb.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/device.h>
27 #include <linux/platform_device.h>
28 #include <linux/uaccess.h>
29 #include <linux/interrupt.h>
30 #include <linux/clk.h>
31 #include <video/da8xx-fb.h>
32
33 #define DRIVER_NAME "da8xx_lcdc"
34
35 /* LCD Status Register */
36 #define LCD_END_OF_FRAME0 BIT(8)
37 #define LCD_FIFO_UNDERFLOW BIT(5)
38 #define LCD_SYNC_LOST BIT(2)
39
40 /* LCD DMA Control Register */
41 #define LCD_DMA_BURST_SIZE(x) ((x) << 4)
42 #define LCD_DMA_BURST_1 0x0
43 #define LCD_DMA_BURST_2 0x1
44 #define LCD_DMA_BURST_4 0x2
45 #define LCD_DMA_BURST_8 0x3
46 #define LCD_DMA_BURST_16 0x4
47 #define LCD_END_OF_FRAME_INT_ENA BIT(2)
48 #define LCD_DUAL_FRAME_BUFFER_ENABLE BIT(0)
49
50 /* LCD Control Register */
51 #define LCD_CLK_DIVISOR(x) ((x) << 8)
52 #define LCD_RASTER_MODE 0x01
53
54 /* LCD Raster Control Register */
55 #define LCD_PALETTE_LOAD_MODE(x) ((x) << 20)
56 #define PALETTE_AND_DATA 0x00
57 #define PALETTE_ONLY 0x01
58
59 #define LCD_MONO_8BIT_MODE BIT(9)
60 #define LCD_RASTER_ORDER BIT(8)
61 #define LCD_TFT_MODE BIT(7)
62 #define LCD_UNDERFLOW_INT_ENA BIT(6)
63 #define LCD_MONOCHROME_MODE BIT(1)
64 #define LCD_RASTER_ENABLE BIT(0)
65 #define LCD_TFT_ALT_ENABLE BIT(23)
66 #define LCD_STN_565_ENABLE BIT(24)
67
68 /* LCD Raster Timing 2 Register */
69 #define LCD_AC_BIAS_TRANSITIONS_PER_INT(x) ((x) << 16)
70 #define LCD_AC_BIAS_FREQUENCY(x) ((x) << 8)
71 #define LCD_SYNC_CTRL BIT(25)
72 #define LCD_SYNC_EDGE BIT(24)
73 #define LCD_INVERT_PIXEL_CLOCK BIT(22)
74 #define LCD_INVERT_LINE_CLOCK BIT(21)
75 #define LCD_INVERT_FRAME_CLOCK BIT(20)
76
77 /* LCD Block */
78 #define LCD_CTRL_REG 0x4
79 #define LCD_STAT_REG 0x8
80 #define LCD_RASTER_CTRL_REG 0x28
81 #define LCD_RASTER_TIMING_0_REG 0x2C
82 #define LCD_RASTER_TIMING_1_REG 0x30
83 #define LCD_RASTER_TIMING_2_REG 0x34
84 #define LCD_DMA_CTRL_REG 0x40
85 #define LCD_DMA_FRM_BUF_BASE_ADDR_0_REG 0x44
86 #define LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG 0x48
87
88 #define WSI_TIMEOUT 50
89 #define PALETTE_SIZE 256
90 #define LEFT_MARGIN 64
91 #define RIGHT_MARGIN 64
92 #define UPPER_MARGIN 32
93 #define LOWER_MARGIN 32
94
95 static resource_size_t da8xx_fb_reg_base;
96 static struct resource *lcdc_regs;
97
98 static inline unsigned int lcdc_read(unsigned int addr)
99 {
100 return (unsigned int)__raw_readl(da8xx_fb_reg_base + (addr));
101 }
102
103 static inline void lcdc_write(unsigned int val, unsigned int addr)
104 {
105 __raw_writel(val, da8xx_fb_reg_base + (addr));
106 }
107
108 struct da8xx_fb_par {
109 resource_size_t p_palette_base;
110 unsigned char *v_palette_base;
111 struct clk *lcdc_clk;
112 int irq;
113 unsigned short pseudo_palette[16];
114 unsigned int databuf_sz;
115 unsigned int palette_sz;
116 };
117
118 /* Variable Screen Information */
119 static struct fb_var_screeninfo da8xx_fb_var __devinitdata = {
120 .xoffset = 0,
121 .yoffset = 0,
122 .transp = {0, 0, 0},
123 .nonstd = 0,
124 .activate = 0,
125 .height = -1,
126 .width = -1,
127 .pixclock = 46666, /* 46us - AUO display */
128 .accel_flags = 0,
129 .left_margin = LEFT_MARGIN,
130 .right_margin = RIGHT_MARGIN,
131 .upper_margin = UPPER_MARGIN,
132 .lower_margin = LOWER_MARGIN,
133 .sync = 0,
134 .vmode = FB_VMODE_NONINTERLACED
135 };
136
137 static struct fb_fix_screeninfo da8xx_fb_fix __devinitdata = {
138 .id = "DA8xx FB Drv",
139 .type = FB_TYPE_PACKED_PIXELS,
140 .type_aux = 0,
141 .visual = FB_VISUAL_PSEUDOCOLOR,
142 .xpanstep = 1,
143 .ypanstep = 1,
144 .ywrapstep = 1,
145 .accel = FB_ACCEL_NONE
146 };
147
148 struct da8xx_panel {
149 const char name[25]; /* Full name <vendor>_<model> */
150 unsigned short width;
151 unsigned short height;
152 int hfp; /* Horizontal front porch */
153 int hbp; /* Horizontal back porch */
154 int hsw; /* Horizontal Sync Pulse Width */
155 int vfp; /* Vertical front porch */
156 int vbp; /* Vertical back porch */
157 int vsw; /* Vertical Sync Pulse Width */
158 int pxl_clk; /* Pixel clock */
159 unsigned char invert_pxl_clk; /* Invert Pixel clock */
160 };
161
162 static struct da8xx_panel known_lcd_panels[] = {
163 /* Sharp LCD035Q3DG01 */
164 [0] = {
165 .name = "Sharp_LCD035Q3DG01",
166 .width = 320,
167 .height = 240,
168 .hfp = 8,
169 .hbp = 6,
170 .hsw = 0,
171 .vfp = 2,
172 .vbp = 2,
173 .vsw = 0,
174 .pxl_clk = 0x10,
175 .invert_pxl_clk = 1,
176 },
177 /* Sharp LK043T1DG01 */
178 [1] = {
179 .name = "Sharp_LK043T1DG01",
180 .width = 480,
181 .height = 272,
182 .hfp = 2,
183 .hbp = 2,
184 .hsw = 41,
185 .vfp = 2,
186 .vbp = 2,
187 .vsw = 10,
188 .pxl_clk = 0x12,
189 .invert_pxl_clk = 0,
190 },
191 };
192
193 /* Disable the Raster Engine of the LCD Controller */
194 static void lcd_disable_raster(struct da8xx_fb_par *par)
195 {
196 u32 reg;
197
198 reg = lcdc_read(LCD_RASTER_CTRL_REG);
199 if (reg & LCD_RASTER_ENABLE)
200 lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
201 }
202
203 static void lcd_blit(int load_mode, struct da8xx_fb_par *par)
204 {
205 u32 tmp = par->p_palette_base + par->databuf_sz - 4;
206 u32 reg;
207
208 /* Update the databuf in the hw. */
209 lcdc_write(par->p_palette_base, LCD_DMA_FRM_BUF_BASE_ADDR_0_REG);
210 lcdc_write(tmp, LCD_DMA_FRM_BUF_CEILING_ADDR_0_REG);
211
212 /* Start the DMA. */
213 reg = lcdc_read(LCD_RASTER_CTRL_REG);
214 reg &= ~(3 << 20);
215 if (load_mode == LOAD_DATA)
216 reg |= LCD_PALETTE_LOAD_MODE(PALETTE_AND_DATA);
217 else if (load_mode == LOAD_PALETTE)
218 reg |= LCD_PALETTE_LOAD_MODE(PALETTE_ONLY);
219
220 lcdc_write(reg, LCD_RASTER_CTRL_REG);
221 }
222
223 /* Configure the Burst Size of DMA */
224 static int lcd_cfg_dma(int burst_size)
225 {
226 u32 reg;
227
228 reg = lcdc_read(LCD_DMA_CTRL_REG) & 0x00000001;
229 switch (burst_size) {
230 case 1:
231 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_1);
232 break;
233 case 2:
234 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_2);
235 break;
236 case 4:
237 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_4);
238 break;
239 case 8:
240 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_8);
241 break;
242 case 16:
243 reg |= LCD_DMA_BURST_SIZE(LCD_DMA_BURST_16);
244 break;
245 default:
246 return -EINVAL;
247 }
248 lcdc_write(reg, LCD_DMA_CTRL_REG);
249
250 return 0;
251 }
252
253 static void lcd_cfg_ac_bias(int period, int transitions_per_int)
254 {
255 u32 reg;
256
257 /* Set the AC Bias Period and Number of Transisitons per Interrupt */
258 reg = lcdc_read(LCD_RASTER_TIMING_2_REG) & 0xFFF00000;
259 reg |= LCD_AC_BIAS_FREQUENCY(period) |
260 LCD_AC_BIAS_TRANSITIONS_PER_INT(transitions_per_int);
261 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
262 }
263
264 static void lcd_cfg_horizontal_sync(int back_porch, int pulse_width,
265 int front_porch)
266 {
267 u32 reg;
268
269 reg = lcdc_read(LCD_RASTER_TIMING_0_REG) & 0xf;
270 reg |= ((back_porch & 0xff) << 24)
271 | ((front_porch & 0xff) << 16)
272 | ((pulse_width & 0x3f) << 10);
273 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
274 }
275
276 static void lcd_cfg_vertical_sync(int back_porch, int pulse_width,
277 int front_porch)
278 {
279 u32 reg;
280
281 reg = lcdc_read(LCD_RASTER_TIMING_1_REG) & 0x3ff;
282 reg |= ((back_porch & 0xff) << 24)
283 | ((front_porch & 0xff) << 16)
284 | ((pulse_width & 0x3f) << 10);
285 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
286 }
287
288 static int lcd_cfg_display(const struct lcd_ctrl_config *cfg)
289 {
290 u32 reg;
291
292 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(LCD_TFT_MODE |
293 LCD_MONO_8BIT_MODE |
294 LCD_MONOCHROME_MODE);
295
296 switch (cfg->p_disp_panel->panel_shade) {
297 case MONOCHROME:
298 reg |= LCD_MONOCHROME_MODE;
299 if (cfg->mono_8bit_mode)
300 reg |= LCD_MONO_8BIT_MODE;
301 break;
302 case COLOR_ACTIVE:
303 reg |= LCD_TFT_MODE;
304 if (cfg->tft_alt_mode)
305 reg |= LCD_TFT_ALT_ENABLE;
306 break;
307
308 case COLOR_PASSIVE:
309 if (cfg->stn_565_mode)
310 reg |= LCD_STN_565_ENABLE;
311 break;
312
313 default:
314 return -EINVAL;
315 }
316
317 /* enable additional interrupts here */
318 reg |= LCD_UNDERFLOW_INT_ENA;
319
320 lcdc_write(reg, LCD_RASTER_CTRL_REG);
321
322 reg = lcdc_read(LCD_RASTER_TIMING_2_REG);
323
324 if (cfg->sync_ctrl)
325 reg |= LCD_SYNC_CTRL;
326 else
327 reg &= ~LCD_SYNC_CTRL;
328
329 if (cfg->sync_edge)
330 reg |= LCD_SYNC_EDGE;
331 else
332 reg &= ~LCD_SYNC_EDGE;
333
334 if (cfg->invert_line_clock)
335 reg |= LCD_INVERT_LINE_CLOCK;
336 else
337 reg &= ~LCD_INVERT_LINE_CLOCK;
338
339 if (cfg->invert_frm_clock)
340 reg |= LCD_INVERT_FRAME_CLOCK;
341 else
342 reg &= ~LCD_INVERT_FRAME_CLOCK;
343
344 lcdc_write(reg, LCD_RASTER_TIMING_2_REG);
345
346 return 0;
347 }
348
349 static int lcd_cfg_frame_buffer(struct da8xx_fb_par *par, u32 width, u32 height,
350 u32 bpp, u32 raster_order)
351 {
352 u32 bpl, reg;
353
354 /* Disable Dual Frame Buffer. */
355 reg = lcdc_read(LCD_DMA_CTRL_REG);
356 lcdc_write(reg & ~LCD_DUAL_FRAME_BUFFER_ENABLE,
357 LCD_DMA_CTRL_REG);
358 /* Set the Panel Width */
359 /* Pixels per line = (PPL + 1)*16 */
360 /*0x3F in bits 4..9 gives max horisontal resolution = 1024 pixels*/
361 width &= 0x3f0;
362 reg = lcdc_read(LCD_RASTER_TIMING_0_REG);
363 reg &= 0xfffffc00;
364 reg |= ((width >> 4) - 1) << 4;
365 lcdc_write(reg, LCD_RASTER_TIMING_0_REG);
366
367 /* Set the Panel Height */
368 reg = lcdc_read(LCD_RASTER_TIMING_1_REG);
369 reg = ((height - 1) & 0x3ff) | (reg & 0xfffffc00);
370 lcdc_write(reg, LCD_RASTER_TIMING_1_REG);
371
372 /* Set the Raster Order of the Frame Buffer */
373 reg = lcdc_read(LCD_RASTER_CTRL_REG) & ~(1 << 8);
374 if (raster_order)
375 reg |= LCD_RASTER_ORDER;
376 lcdc_write(reg, LCD_RASTER_CTRL_REG);
377
378 switch (bpp) {
379 case 1:
380 case 2:
381 case 4:
382 case 16:
383 par->palette_sz = 16 * 2;
384 break;
385
386 case 8:
387 par->palette_sz = 256 * 2;
388 break;
389
390 default:
391 return -EINVAL;
392 }
393
394 bpl = width * bpp / 8;
395 par->databuf_sz = height * bpl + par->palette_sz;
396
397 return 0;
398 }
399
400 static int fb_setcolreg(unsigned regno, unsigned red, unsigned green,
401 unsigned blue, unsigned transp,
402 struct fb_info *info)
403 {
404 struct da8xx_fb_par *par = info->par;
405 unsigned short *palette = (unsigned short *)par->v_palette_base;
406 u_short pal;
407
408 if (regno > 255)
409 return 1;
410
411 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR)
412 return 1;
413
414 if (info->var.bits_per_pixel == 8) {
415 red >>= 4;
416 green >>= 8;
417 blue >>= 12;
418
419 pal = (red & 0x0f00);
420 pal |= (green & 0x00f0);
421 pal |= (blue & 0x000f);
422
423 palette[regno] = pal;
424
425 } else if ((info->var.bits_per_pixel == 16) && regno < 16) {
426 red >>= (16 - info->var.red.length);
427 red <<= info->var.red.offset;
428
429 green >>= (16 - info->var.green.length);
430 green <<= info->var.green.offset;
431
432 blue >>= (16 - info->var.blue.length);
433 blue <<= info->var.blue.offset;
434
435 par->pseudo_palette[regno] = red | green | blue;
436
437 palette[0] = 0x4000;
438 }
439
440 return 0;
441 }
442
443 static void lcd_reset(struct da8xx_fb_par *par)
444 {
445 /* Disable the Raster if previously Enabled */
446 if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE)
447 lcd_disable_raster(par);
448
449 /* DMA has to be disabled */
450 lcdc_write(0, LCD_DMA_CTRL_REG);
451 lcdc_write(0, LCD_RASTER_CTRL_REG);
452 }
453
454 static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
455 struct da8xx_panel *panel)
456 {
457 u32 bpp;
458 int ret = 0;
459
460 lcd_reset(par);
461
462 /* Configure the LCD clock divisor. */
463 lcdc_write(LCD_CLK_DIVISOR(panel->pxl_clk) |
464 (LCD_RASTER_MODE & 0x1), LCD_CTRL_REG);
465
466 if (panel->invert_pxl_clk)
467 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) |
468 LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
469 else
470 lcdc_write((lcdc_read(LCD_RASTER_TIMING_2_REG) &
471 ~LCD_INVERT_PIXEL_CLOCK), LCD_RASTER_TIMING_2_REG);
472
473 /* Configure the DMA burst size. */
474 ret = lcd_cfg_dma(cfg->dma_burst_sz);
475 if (ret < 0)
476 return ret;
477
478 /* Configure the AC bias properties. */
479 lcd_cfg_ac_bias(cfg->ac_bias, cfg->ac_bias_intrpt);
480
481 /* Configure the vertical and horizontal sync properties. */
482 lcd_cfg_vertical_sync(panel->vbp, panel->vsw, panel->vfp);
483 lcd_cfg_horizontal_sync(panel->hbp, panel->hsw, panel->hfp);
484
485 /* Configure for disply */
486 ret = lcd_cfg_display(cfg);
487 if (ret < 0)
488 return ret;
489
490 if (QVGA != cfg->p_disp_panel->panel_type)
491 return -EINVAL;
492
493 if (cfg->bpp <= cfg->p_disp_panel->max_bpp &&
494 cfg->bpp >= cfg->p_disp_panel->min_bpp)
495 bpp = cfg->bpp;
496 else
497 bpp = cfg->p_disp_panel->max_bpp;
498 if (bpp == 12)
499 bpp = 16;
500 ret = lcd_cfg_frame_buffer(par, (unsigned int)panel->width,
501 (unsigned int)panel->height, bpp,
502 cfg->raster_order);
503 if (ret < 0)
504 return ret;
505
506 /* Configure FDD */
507 lcdc_write((lcdc_read(LCD_RASTER_CTRL_REG) & 0xfff00fff) |
508 (cfg->fdd << 12), LCD_RASTER_CTRL_REG);
509
510 return 0;
511 }
512
513 static irqreturn_t lcdc_irq_handler(int irq, void *arg)
514 {
515 u32 stat = lcdc_read(LCD_STAT_REG);
516 u32 reg;
517
518 if ((stat & LCD_SYNC_LOST) && (stat & LCD_FIFO_UNDERFLOW)) {
519 reg = lcdc_read(LCD_RASTER_CTRL_REG);
520 lcdc_write(reg & ~LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
521 lcdc_write(stat, LCD_STAT_REG);
522 lcdc_write(reg | LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
523 } else
524 lcdc_write(stat, LCD_STAT_REG);
525
526 return IRQ_HANDLED;
527 }
528
529 static int fb_check_var(struct fb_var_screeninfo *var,
530 struct fb_info *info)
531 {
532 int err = 0;
533
534 switch (var->bits_per_pixel) {
535 case 1:
536 case 8:
537 var->red.offset = 0;
538 var->red.length = 8;
539 var->green.offset = 0;
540 var->green.length = 8;
541 var->blue.offset = 0;
542 var->blue.length = 8;
543 var->transp.offset = 0;
544 var->transp.length = 0;
545 break;
546 case 4:
547 var->red.offset = 0;
548 var->red.length = 4;
549 var->green.offset = 0;
550 var->green.length = 4;
551 var->blue.offset = 0;
552 var->blue.length = 4;
553 var->transp.offset = 0;
554 var->transp.length = 0;
555 break;
556 case 16: /* RGB 565 */
557 var->red.offset = 0;
558 var->red.length = 5;
559 var->green.offset = 5;
560 var->green.length = 6;
561 var->blue.offset = 11;
562 var->blue.length = 5;
563 var->transp.offset = 0;
564 var->transp.length = 0;
565 break;
566 default:
567 err = -EINVAL;
568 }
569
570 var->red.msb_right = 0;
571 var->green.msb_right = 0;
572 var->blue.msb_right = 0;
573 var->transp.msb_right = 0;
574 return err;
575 }
576
577 static int __devexit fb_remove(struct platform_device *dev)
578 {
579 struct fb_info *info = dev_get_drvdata(&dev->dev);
580
581 if (info) {
582 struct da8xx_fb_par *par = info->par;
583
584 if (lcdc_read(LCD_RASTER_CTRL_REG) & LCD_RASTER_ENABLE)
585 lcd_disable_raster(par);
586 lcdc_write(0, LCD_RASTER_CTRL_REG);
587
588 /* disable DMA */
589 lcdc_write(0, LCD_DMA_CTRL_REG);
590
591 unregister_framebuffer(info);
592 fb_dealloc_cmap(&info->cmap);
593 dma_free_coherent(NULL, par->databuf_sz + PAGE_SIZE,
594 info->screen_base,
595 info->fix.smem_start);
596 free_irq(par->irq, par);
597 clk_disable(par->lcdc_clk);
598 clk_put(par->lcdc_clk);
599 framebuffer_release(info);
600 iounmap((void __iomem *)da8xx_fb_reg_base);
601 release_mem_region(lcdc_regs->start, resource_size(lcdc_regs));
602
603 }
604 return 0;
605 }
606
607 static int fb_ioctl(struct fb_info *info, unsigned int cmd,
608 unsigned long arg)
609 {
610 struct lcd_sync_arg sync_arg;
611
612 switch (cmd) {
613 case FBIOGET_CONTRAST:
614 case FBIOPUT_CONTRAST:
615 case FBIGET_BRIGHTNESS:
616 case FBIPUT_BRIGHTNESS:
617 case FBIGET_COLOR:
618 case FBIPUT_COLOR:
619 return -ENOTTY;
620 case FBIPUT_HSYNC:
621 if (copy_from_user(&sync_arg, (char *)arg,
622 sizeof(struct lcd_sync_arg)))
623 return -EFAULT;
624 lcd_cfg_horizontal_sync(sync_arg.back_porch,
625 sync_arg.pulse_width,
626 sync_arg.front_porch);
627 break;
628 case FBIPUT_VSYNC:
629 if (copy_from_user(&sync_arg, (char *)arg,
630 sizeof(struct lcd_sync_arg)))
631 return -EFAULT;
632 lcd_cfg_vertical_sync(sync_arg.back_porch,
633 sync_arg.pulse_width,
634 sync_arg.front_porch);
635 break;
636 default:
637 return -EINVAL;
638 }
639 return 0;
640 }
641
642 static struct fb_ops da8xx_fb_ops = {
643 .owner = THIS_MODULE,
644 .fb_check_var = fb_check_var,
645 .fb_setcolreg = fb_setcolreg,
646 .fb_ioctl = fb_ioctl,
647 .fb_fillrect = cfb_fillrect,
648 .fb_copyarea = cfb_copyarea,
649 .fb_imageblit = cfb_imageblit,
650 };
651
652 static int __init fb_probe(struct platform_device *device)
653 {
654 struct da8xx_lcdc_platform_data *fb_pdata =
655 device->dev.platform_data;
656 struct lcd_ctrl_config *lcd_cfg;
657 struct da8xx_panel *lcdc_info;
658 struct fb_info *da8xx_fb_info;
659 struct clk *fb_clk = NULL;
660 struct da8xx_fb_par *par;
661 resource_size_t len;
662 int ret, i;
663
664 if (fb_pdata == NULL) {
665 dev_err(&device->dev, "Can not get platform data\n");
666 return -ENOENT;
667 }
668
669 lcdc_regs = platform_get_resource(device, IORESOURCE_MEM, 0);
670 if (!lcdc_regs) {
671 dev_err(&device->dev,
672 "Can not get memory resource for LCD controller\n");
673 return -ENOENT;
674 }
675
676 len = resource_size(lcdc_regs);
677
678 lcdc_regs = request_mem_region(lcdc_regs->start, len, lcdc_regs->name);
679 if (!lcdc_regs)
680 return -EBUSY;
681
682 da8xx_fb_reg_base = (resource_size_t)ioremap(lcdc_regs->start, len);
683 if (!da8xx_fb_reg_base) {
684 ret = -EBUSY;
685 goto err_request_mem;
686 }
687
688 fb_clk = clk_get(&device->dev, NULL);
689 if (IS_ERR(fb_clk)) {
690 dev_err(&device->dev, "Can not get device clock\n");
691 ret = -ENODEV;
692 goto err_ioremap;
693 }
694 ret = clk_enable(fb_clk);
695 if (ret)
696 goto err_clk_put;
697
698 for (i = 0, lcdc_info = known_lcd_panels;
699 i < ARRAY_SIZE(known_lcd_panels);
700 i++, lcdc_info++) {
701 if (strcmp(fb_pdata->type, lcdc_info->name) == 0)
702 break;
703 }
704
705 if (i == ARRAY_SIZE(known_lcd_panels)) {
706 dev_err(&device->dev, "GLCD: No valid panel found\n");
707 ret = ENODEV;
708 goto err_clk_disable;
709 } else
710 dev_info(&device->dev, "GLCD: Found %s panel\n",
711 fb_pdata->type);
712
713 lcd_cfg = (struct lcd_ctrl_config *)fb_pdata->controller_data;
714
715 da8xx_fb_info = framebuffer_alloc(sizeof(struct da8xx_fb_par),
716 &device->dev);
717 if (!da8xx_fb_info) {
718 dev_dbg(&device->dev, "Memory allocation failed for fb_info\n");
719 ret = -ENOMEM;
720 goto err_clk_disable;
721 }
722
723 par = da8xx_fb_info->par;
724
725 if (lcd_init(par, lcd_cfg, lcdc_info) < 0) {
726 dev_err(&device->dev, "lcd_init failed\n");
727 ret = -EFAULT;
728 goto err_release_fb;
729 }
730
731 /* allocate frame buffer */
732 da8xx_fb_info->screen_base = dma_alloc_coherent(NULL,
733 par->databuf_sz + PAGE_SIZE,
734 (resource_size_t *)
735 &da8xx_fb_info->fix.smem_start,
736 GFP_KERNEL | GFP_DMA);
737
738 if (!da8xx_fb_info->screen_base) {
739 dev_err(&device->dev,
740 "GLCD: kmalloc for frame buffer failed\n");
741 ret = -EINVAL;
742 goto err_release_fb;
743 }
744
745 /* move palette base pointer by (PAGE_SIZE - palette_sz) bytes */
746 par->v_palette_base = da8xx_fb_info->screen_base +
747 (PAGE_SIZE - par->palette_sz);
748 par->p_palette_base = da8xx_fb_info->fix.smem_start +
749 (PAGE_SIZE - par->palette_sz);
750
751 /* the rest of the frame buffer is pixel data */
752 da8xx_fb_fix.smem_start = par->p_palette_base + par->palette_sz;
753 da8xx_fb_fix.smem_len = par->databuf_sz - par->palette_sz;
754 da8xx_fb_fix.line_length = (lcdc_info->width * lcd_cfg->bpp) / 8;
755
756 par->lcdc_clk = fb_clk;
757
758 par->irq = platform_get_irq(device, 0);
759 if (par->irq < 0) {
760 ret = -ENOENT;
761 goto err_release_fb_mem;
762 }
763
764 ret = request_irq(par->irq, lcdc_irq_handler, 0, DRIVER_NAME, par);
765 if (ret)
766 goto err_release_fb_mem;
767
768 /* Initialize par */
769 da8xx_fb_info->var.bits_per_pixel = lcd_cfg->bpp;
770
771 da8xx_fb_var.xres = lcdc_info->width;
772 da8xx_fb_var.xres_virtual = lcdc_info->width;
773
774 da8xx_fb_var.yres = lcdc_info->height;
775 da8xx_fb_var.yres_virtual = lcdc_info->height;
776
777 da8xx_fb_var.grayscale =
778 lcd_cfg->p_disp_panel->panel_shade == MONOCHROME ? 1 : 0;
779 da8xx_fb_var.bits_per_pixel = lcd_cfg->bpp;
780
781 da8xx_fb_var.hsync_len = lcdc_info->hsw;
782 da8xx_fb_var.vsync_len = lcdc_info->vsw;
783
784 /* Initialize fbinfo */
785 da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
786 da8xx_fb_info->fix = da8xx_fb_fix;
787 da8xx_fb_info->var = da8xx_fb_var;
788 da8xx_fb_info->fbops = &da8xx_fb_ops;
789 da8xx_fb_info->pseudo_palette = par->pseudo_palette;
790
791 ret = fb_alloc_cmap(&da8xx_fb_info->cmap, PALETTE_SIZE, 0);
792 if (ret)
793 goto err_free_irq;
794
795 /* First palette_sz byte of the frame buffer is the palette */
796 da8xx_fb_info->cmap.len = par->palette_sz;
797
798 /* Flush the buffer to the screen. */
799 lcd_blit(LOAD_DATA, par);
800
801 /* initialize var_screeninfo */
802 da8xx_fb_var.activate = FB_ACTIVATE_FORCE;
803 fb_set_var(da8xx_fb_info, &da8xx_fb_var);
804
805 dev_set_drvdata(&device->dev, da8xx_fb_info);
806 /* Register the Frame Buffer */
807 if (register_framebuffer(da8xx_fb_info) < 0) {
808 dev_err(&device->dev,
809 "GLCD: Frame Buffer Registration Failed!\n");
810 ret = -EINVAL;
811 goto err_dealloc_cmap;
812 }
813
814 /* enable raster engine */
815 lcdc_write(lcdc_read(LCD_RASTER_CTRL_REG) |
816 LCD_RASTER_ENABLE, LCD_RASTER_CTRL_REG);
817
818 return 0;
819
820 err_dealloc_cmap:
821 fb_dealloc_cmap(&da8xx_fb_info->cmap);
822
823 err_free_irq:
824 free_irq(par->irq, par);
825
826 err_release_fb_mem:
827 dma_free_coherent(NULL, par->databuf_sz + PAGE_SIZE,
828 da8xx_fb_info->screen_base,
829 da8xx_fb_info->fix.smem_start);
830
831 err_release_fb:
832 framebuffer_release(da8xx_fb_info);
833
834 err_clk_disable:
835 clk_disable(fb_clk);
836
837 err_clk_put:
838 clk_put(fb_clk);
839
840 err_ioremap:
841 iounmap((void __iomem *)da8xx_fb_reg_base);
842
843 err_request_mem:
844 release_mem_region(lcdc_regs->start, len);
845
846 return ret;
847 }
848
849 #ifdef CONFIG_PM
850 static int fb_suspend(struct platform_device *dev, pm_message_t state)
851 {
852 return -EBUSY;
853 }
854 static int fb_resume(struct platform_device *dev)
855 {
856 return -EBUSY;
857 }
858 #else
859 #define fb_suspend NULL
860 #define fb_resume NULL
861 #endif
862
863 static struct platform_driver da8xx_fb_driver = {
864 .probe = fb_probe,
865 .remove = fb_remove,
866 .suspend = fb_suspend,
867 .resume = fb_resume,
868 .driver = {
869 .name = DRIVER_NAME,
870 .owner = THIS_MODULE,
871 },
872 };
873
874 static int __init da8xx_fb_init(void)
875 {
876 return platform_driver_register(&da8xx_fb_driver);
877 }
878
879 static void __exit da8xx_fb_cleanup(void)
880 {
881 platform_driver_unregister(&da8xx_fb_driver);
882 }
883
884 module_init(da8xx_fb_init);
885 module_exit(da8xx_fb_cleanup);
886
887 MODULE_DESCRIPTION("Framebuffer driver for TI da8xx/omap-l1xx");
888 MODULE_AUTHOR("Texas Instruments");
889 MODULE_LICENSE("GPL");
Linux with added FPC-III support